2.10 Once you have the blade fitted up you can set up your rivet holes. Here is an important point. I use what is called a piloted counterbore for drilling the recesses for the rivet heads. If you do not have a ¼” piloted counterbore start your rivet holes by first drilling a recess for the rivet head using a ¼” drill bit. Drill a shallow ¼” diameter recess about 0.050” deep to take the rivet head, no deeper. Don’t forget to drill both sides of the handle. Next or if you do use a counterbore use a 3/16” drill...